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Java > Open Source Codes > soot > jimple > toolkits > annotation > defs > ReachingDefsTagger


1 /* Soot - a J*va Optimization Framework
2  * Copyright (C) 2004 Jennifer Lhotak
3  *
4  * This library is free software; you can redistribute it and/or
5  * modify it under the terms of the GNU Lesser General Public
6  * License as published by the Free Software Foundation; either
7  * version 2.1 of the License, or (at your option) any later version.
8  *
9  * This library is distributed in the hope that it will be useful,
10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12  * Lesser General Public License for more details.
13  *
14  * You should have received a copy of the GNU Lesser General Public
15  * License along with this library; if not, write to the
16  * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
17  * Boston, MA 02111-1307, USA.
18  */
19
20 package soot.jimple.toolkits.annotation.defs;
21
22 import soot.*;
23 import soot.toolkits.scalar.*;
24 import soot.toolkits.graph.*;
25 import soot.tagkit.*;
26 import java.util.*;
27 import soot.jimple.*;
28
29 public class ReachingDefsTagger extends BodyTransformer {
30
31
32     public ReachingDefsTagger(Singletons.Global g) {}
33     public static ReachingDefsTagger v() { return G.v().soot_jimple_toolkits_annotation_defs_ReachingDefsTagger();}
34
35     protected void internalTransform(Body b, String JavaDoc phaseName, Map options){
36     
37         UnitGraph g = new ExceptionalUnitGraph(b);
38         LocalDefs sld = new SmartLocalDefs(g, new SimpleLiveLocals(g));
39
40         Iterator it = b.getUnits().iterator();
41         while (it.hasNext()){
42             Stmt s = (Stmt)it.next();
43             //System.out.println("stmt: "+s);
44 Iterator usesIt = s.getUseBoxes().iterator();
45             while (usesIt.hasNext()){
46                 ValueBox vbox = (ValueBox)usesIt.next();
47                 if (vbox.getValue() instanceof Local) {
48                     Local l = (Local)vbox.getValue();
49                     //System.out.println("local: "+l);
50 Iterator rDefsIt = sld.getDefsOfAt(l, s).iterator();
51                     while (rDefsIt.hasNext()){
52                         Stmt next = (Stmt)rDefsIt.next();
53                         String JavaDoc info = l+" has reaching def: "+next.toString();
54                         s.addTag(new LinkTag(info, next, b.getMethod().getDeclaringClass().getName(), "Reaching Defs"));
55                     }
56                 }
57             }
58         }
59     }
60 }
61
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